Annual maintenance at Sutton Bank is set to lead to a week long closure of the A170.
The scheme, between Helmsley and Thirsk, will begin on Sunday, September 8, as North Yorkshire Council ensure that it remains structurally sound.
The council's highways team will inspect the face of the slope to prevent any rocks from falling, the boreholes to check for landslips, and clear overhanging vegetation.
They will repair the restraint barriers on one of the hairpin bends following a recent collision, and trenches across the road will be dug to wire the electrics for three new vehicle activated signs.
North Yorkshire Council’s executive member for highways and transport, Cllr Keane Duncan, said: "The A170 is a key route for residents, commuters and visitors so we do everything we can to minimise the time it is closed.
"The Sutton Bank annual maintenance scheme is so important in allowing us to condense essential works into a single closure.
"It is critical to avoiding any unforeseen, disruptive closures of the A170 through the year.
"We appreciate the disruption the diversion will cause but ask the public for their cooperation and patience."
The road is due to be closed from 7am on Sunday, September 8, until 7pm on Sunday, September 15.
A sign-posted diversion will be in place, the council says operatives will maintain access to homes on Sutton Bank where possible.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here